CN201087908Y - Cylindrical lithium battery structure - Google Patents
Cylindrical lithium battery structure Download PDFInfo
- Publication number
- CN201087908Y CN201087908Y CNU2007200492016U CN200720049201U CN201087908Y CN 201087908 Y CN201087908 Y CN 201087908Y CN U2007200492016 U CNU2007200492016 U CN U2007200492016U CN 200720049201 U CN200720049201 U CN 200720049201U CN 201087908 Y CN201087908 Y CN 201087908Y
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- CN
- China
- Prior art keywords
- battery
- lithium battery
- chassis
- steam vent
- tank body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Gas Exhaust Devices For Batteries (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model relates to the column-shaped lithium battery technology field, in particular to a column-shaped lithium battery structure which can effectively ensure the security and the stability of the battery. The column-shaped lithium battery comprises a pot body, a defending cover cap arranged at the opening at the upper end of the pot body and a battery core positioned in the pot body, wherein, the pot body comprises a main body without bottom and a chassis which is welded on the port of the main body bottom, and an exhausting hole which is used for exhausting the gas generated after the formation processing of the battery is arranged on the chassis. By adopting the structure, the utility model can exhaust the gas generated in the pot body through the exhausting hole after the formation processing of the lithium battery. When the gas is exhausted, the exhausting hole is plugged through a vent plug, thereby ensuring the security and the stability of the battery. The manufacturing method is simple, and the utility model is convenient for batch production.
Description
Technical field
The utility model relates to the cylindricality technical field of lithium batteries, refers in particular to a kind of cylindricality lithium battery structure that can effectively guarantee battery security and stability, adopts the cylindricality lithium battery of this structure can discharge battery easily and changes into the gas that its inside, back is produced.
Background technology
Development along with modern society, mobile device such as video camera, notebook computer, mobile DVD and digital camera etc. have obtained application more and more widely, thereby formed the wilderness demand to high-energy battery, the cylindricality lithium ion battery is because high energy density has obtained application widely.Because the very high lithium/carbon compound of pair water activity is arranged,, in order to solve the cell sealing problem, generally to add glue to battery seal ring and seal in the industry in the lithium ion battery so need good sealing be arranged with the external world.But, make inner pressure of battery excessive and the danger of blast is arranged, so lithium ion battery needs power-off protection and protector when interior pressure is excessive because lithium ion battery can be because of electrolyte decomposition produces gas when improper use.Safety device commonly used at present is to adopt a kind of protection block.For example (number of patent application is a lithium ion battery protection block utility model patent of the applicant's application once in 2006: 200620001193.3).See Fig. 1, this utility model comprises: explosion-proof valve 51, power-off protection apparatus 52, positive temperature coefficient (PTC) ring plate 53, top cover 54 and seal 55.Explosion-proof valve 51 has the ring-type indentation.Top cover 54, ring plate 53, explosion-proof valve 51 and power-off protection apparatus 52 are installed in the seal 55; obtain combination protection block 5; power-off protection apparatus 52 laser welding in the positive pole ear of the electric core 56 of having annotated electrolyte and the protection block 5 together, weld 5 the electric core 56 of blocking a shot and seals through mechanical riveted again after i.e. formation assemble battery.During use, if when electric core 56 external short circuits or charging and discharging currents surpass the operating current of positive temperature coefficient ring plate 53, positive temperature coefficient ring plate 53 raises by temperature, and resistance increases and reduces electric current, to protect electric core; When electric core 56 causes internal gas pressure to increase to the protection pressure of setting because of inefficacy; explosion-proof valve 51 will be by the upwards upset of indentation place; be that whole lug boss will upwards overturn; this moment, power-off protection apparatus 52 came off with welding portion; cause forming between lug and the explosion-proof valve 51 and open circuit; so electric core 56 is in the failure state that opens circuit and can not discharges and recharges, thereby also uses continuing when avoiding electric core 56 to lose efficacy.If electric in-core portion air pressure after opening circuit, also continue to rise, when reaching set point, explosion-proof valve 51 pops and pressure release, avoids the battery accident of blasting.
Though adopt the cylindricality lithium battery of technique scheme to improve a lot in fail safe, it still exists some problems to need to improve.When making this cylindricality lithium ion battery, at first, winding electricity core, and in the housing with its one one end opening of packing into, the lug that electric core bottom is drawn is welded on the bottom of battery container again, injects the electrolyte in the battery container again, then cell polar ear is welded on the protection block, the electric core that will weld good protection block is again packed in the housing of one one end opening, and then will protect blocks a shot is fixed in housing upper end open place.Then packaged battery is changed into.When changing into processing, electric core will produce certain gas, and these gases are present in can't discharge in the housing and will exert an influence to battery security, stability.Will but the gas in the housing is discharged is very difficult, this be because this moment housing seal, unless when destroying housing or electric in-core portion air pressure and reaching set point, break through explosion-proof valve and pressure release, otherwise gas is difficult to discharge.
The utility model content
Technical problem to be solved in the utility model just is at the existing deficiency of present product, and a kind of cylindricality lithium battery structure with higher-security and stability is provided.Adopt the cylindricality lithium battery of this structure can discharge battery easily and change into the gas that its inside, back is produced, effectively guarantee the fail safe and the stability of battery.
For solving the problems of the technologies described above, the utility model has adopted following technical scheme: this cylindricality lithium battery comprises tank body, is installed on the protection block of tank body upper end open and the battery that is positioned at tank body, wherein tank body comprises: main body of the no end and the chassis that is welded on main body bottom surface port, the chassis adopts Stainless Steel to make, and it is slightly thicker than main body of the no end, can adopt the laser welding mode to fix between chassis and the main body of the no end during assembling.The chassis is provided with and is used to discharge the steam vent that battery changes into the back gas that produces, this steam vent be used to discharge battery change into produce gas before employing one plastic film be affixed on the steam vent inboard and seal.
In addition, tank body also is provided with a stopple that is used with above-mentioned steam vent, and this stopple can adopt a steel ball.
After the utility model adopted said structure, lithium battery can puncture the plastic film that is affixed on the steam vent inboard after changing into processing, and by above-mentioned steam vent gas in the battery was extracted out, will be pressed into as the steel ball of stopple then in the steam vent with cell sealing.So just can guarantee the fail safe and the stability of battery.Its manufacture method is simple, is convenient to produce in batches.In addition, the utility model tank body adopts main body of the no end and chassis welding to form, and it adopts stainless steel material, so that offer steam vent, adopts stainless steel material need not carry out electroplating processes simultaneously, can directly carry out weld job.Same the utility model has kept protection block design in the existing product, effectively to avoid the too high potential safety hazard of being brought of inside battery air pressure, can in time gas be discharged.
Description of drawings:
Fig. 1 is the structural representation of existing a cylindricality lithium ion battery product;
Fig. 2 is a structural representation of the present utility model;
Fig. 3 is the partial enlarged drawing of Fig. 2.
Specific embodiment:
See Fig. 2,3, the utility model comprises: tank body 1, the protection block 2 that is installed on tank body 1 upper end open and the battery 3 that is positioned at tank body 1.
Tank body 1 comprises: the main body of the no end 11 of tubular and the chassis 12 that is welded on main body 11 bottom surface ports.Chassis 12 adopts stainless steels to make, and it is slightly thicker than no end main body 11, and the employing laser welding is fixed together between chassis 12 and the main body 11.Chassis 12 is provided with steam vent 4.This steam vent 4 is a non-through hole that is opened on the chassis 12 during fabrication, thereby promptly steam vent 4 need be under the foreign object effect be broken it and formed through hole.Usually, this steam vent be used to discharge battery change into adopt a plastic film to be affixed on the steam vent inboard before producing gas to seal.Main body 11 and chassis 12 adopts stainless steel materials to make, and is convenient to process steam vent 4 like this and stopple 41 is installed in the steam vent 4.In addition, adopt stainless steel material need not carry out electroplating processes.
The protection block 2 that the utility model adopted is with the conventional batteries block is identical at present, and it has kept inner power-off protection apparatus.The utility model function of safety protection of just keeping original battery and being had like this, and further increased the stability and the fail safe of battery by the improvement that increases newly.
During installation, at first, the negative lug of electric core 3 is welded on the chassis 12, then electric core is put into tank body 1, simultaneously chassis 12 is installed in main body 11 bottom ports, and both are welded together.Then; tank body 1 is carried out slot rolling; electric core 3 positive pole ears and power-off protection apparatus in the protection block 2 are welded together, and the block 2 good with electric core 3 welding is installed in tank body 1 upper port, and will protect after sealing through mechanical riveted blocks a shot 2 combines with the main body 11 of tank body 1.Inject electrolyte at last.With plastic film entire cell is encapsulated after injecting electrolyte, next successively battery is changed into processing.This moment, tank body 1 was air-tight state because steam vent 4 is not run through.After changing into processing, need to discharge gas in the battery, break steam vent 4 with foreign object this moment, allow tank body 1 inner space and external communications, the gas of battery in formation process is discharged, then a stopple 41 is pressed into steam vent 4 and it is welded on steam vent 4 places, form the battery that assembles this moment.
During use, if when electric core 3 causes internal gas pressure to increase to the protection pressure of setting because of inefficacy, for example electric in-core portion air pressure raises fast.The utility model can guarantee cell safeties by protection block 2, and promptly air pressure is when reach set point, and protection block 2 interior explosion-proof valves pop and pressure release, avoids the battery accident of blasting.
Certainly, the above only is an example of the present utility model, be not to limit practical range of the present utility model, all equivalences of doing according to the described structure of the utility model claim, feature and principle change or modify, and all should be included in the scope of the application's patent.
Claims (4)
1. cylindricality lithium battery structure, comprise: tank body (1), the protection block (2) that is installed on tank body (1) upper end open and the battery (3) that is positioned at tank body (1), it is characterized in that: described tank body (1) comprising: main body of the no end (11) and the chassis (12) that is welded on main body (11) bottom surface port, and chassis (12) are provided with and are used to discharge the steam vent (4) that battery changes into the back gas that produces.
2. cylindricality lithium battery structure according to claim 1 is characterized in that: locate to be provided with a stopple with its shutoff (41) in described steam vent (4).
3. cylindricality lithium battery structure according to claim 2 is characterized in that: described stopple (41) is a steel ball, and this steel ball is welded in the steam vent (4).
4. according to any described cylindricality lithium battery structure in the claim 1～3, it is characterized in that: adopt the laser welding mode to fix between the chassis (12) that the employing stainless steel material is made and the main body (11) of tank body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200492016U CN201087908Y (en) | 2007-03-13 | 2007-03-13 | Cylindrical lithium battery structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200492016U CN201087908Y (en) | 2007-03-13 | 2007-03-13 | Cylindrical lithium battery structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201087908Y true CN201087908Y (en) | 2008-07-16 |
Family
ID=39635494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200492016U Expired - Fee Related CN201087908Y (en) | 2007-03-13 | 2007-03-13 | Cylindrical lithium battery structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201087908Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017113352A1 (en) * | 2015-12-31 | 2017-07-06 | 深圳市大富精工有限公司 | Battery |
-
2007
- 2007-03-13 CN CNU2007200492016U patent/CN201087908Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017113352A1 (en) * | 2015-12-31 | 2017-07-06 | 深圳市大富精工有限公司 | Battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Dongguan Amperex Technology Co., Ltd. Assignor: Dongguan New Energy Source Electronic Sci-Tech Co., Ltd. Contract fulfillment period: 2008.7.31 to 2014.7.31 Contract record no.: 2009440000935 Denomination of utility model: Cylindrical lithium battery structure Granted publication date: 20080716 License type: Exclusive license Record date: 20090804 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.7.31 TO 2014.7.31; CHANGE OF CONTRACT Name of requester: DONGGUAN NEW ENERGY TECHNOLOGY CO. Effective date: 20090804 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080716 Termination date: 20100313 |